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Date: Mon, 30 Nov 2015 23:57:29 +0100
From: Richard Weinberger <>
To: "Eric W. Biederman" <>,
 David Miller <>
Cc: "" <>,
 "" <>,
 "" <>,,
 Stephen Hemminger <>,
 Kees Cook <>
Subject: Re: [PATCH net] bridge: Only call /sbin/bridge-stp for the initial
 network namespace

Am 30.11.2015 um 22:38 schrieb Eric W. Biederman:
> There is no defined mechanism to pass network namespace information
> into /sbin/bridge-stp therefore don't even try to invoke it except
> for bridge devices in the initial network namespace.
> It is possible for unprivileged users to cause /sbin/bridge-stp to be
> invoked for any network device name which if /sbin/bridge-stp does not
> guard against unreasonable arguments or being invoked twice on the same
> network device could cause problems.
> Signed-off-by: "Eric W. Biederman" <>

Just figured that /sbin/bridge-stp is a shell script.
Network interfaces can contain a lot of funny characters,
maybe this is after all a security issue.


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